From publisher blurb:
The definitive sourcebook for introducing modern and magical rifles to your Fifth Edition games! Whether you plan to run a modern-era game, a techno-fantasy campaign or just need to introduce a few alien relics from an advanced, forgotten civilisation, this book has you covered. Assembled by the eccentric but nevertheless brilliant dwarf explorer and gun aficionado Zane Ironheart, the Guide to Rifles features:
Simple rules for handling firearms in Fifth Edition, including ammo, malfunctions, burst fire and autofire.
5 basic rifle models to get you started. Get an Assault rifle, a fearsome Battle rifle or the mighty Fifty-Cal.
20 magical rifles, from uncommon guns with useful abilities all the way up to legendary rifles that will shake the entire battlefield. Dissolve your enemies with the Painful Odyssey. Hunt them down with the Pack Hunter. Dominate the battlefield with the Zeta Fantastic Mark One.
A new feat, a new fighting style and a new archetype for sniper rangers.